e96fa6c911
The i2s bus is commonly used with audio codecs. It provides a way to stream digital data sychronously in both directions. U-Boot only supports audio output, so this uclass is very simple, with a single tx_data() method. Add a uclass and a test for i2s. Signed-off-by: Simon Glass <sjg@chromium.org>
33 lines
756 B
C
33 lines
756 B
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright 2018 Google LLC
|
|
* Written by Simon Glass <sjg@chromium.org>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <i2s.h>
|
|
#include <dm/test.h>
|
|
#include <test/ut.h>
|
|
#include <asm/test.h>
|
|
|
|
/* Basic test of the i2s codec uclass */
|
|
static int dm_test_i2s(struct unit_test_state *uts)
|
|
{
|
|
struct udevice *dev;
|
|
u8 data[3];
|
|
|
|
/* check probe success */
|
|
ut_assertok(uclass_first_device_err(UCLASS_I2S, &dev));
|
|
data[0] = 1;
|
|
data[1] = 4;
|
|
data[2] = 6;
|
|
ut_assertok(i2s_tx_data(dev, data, ARRAY_SIZE(data)));
|
|
ut_asserteq(11, sandbox_get_i2s_sum(dev));
|
|
ut_assertok(i2s_tx_data(dev, data, 1));
|
|
ut_asserteq(12, sandbox_get_i2s_sum(dev));
|
|
|
|
return 0;
|
|
}
|
|
DM_TEST(dm_test_i2s, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);
|